net.jpountz.lz4.LZ4JNICompressor Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of redisson-all Show documentation
Show all versions of redisson-all Show documentation
Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC
package net.jpountz.lz4;
/*
* Copyright 2020 Adrien Grand and the lz4-java contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import static net.jpountz.util.ByteBufferUtils.checkNotReadOnly;
import static net.jpountz.util.ByteBufferUtils.checkRange;
import static net.jpountz.util.SafeUtils.checkRange;
import java.nio.ByteBuffer;
/**
* Fast {@link LZ4FastCompressor}s implemented with JNI bindings to the original C
* implementation of LZ4.
*/
final class LZ4JNICompressor extends LZ4Compressor {
public static final LZ4Compressor INSTANCE = new LZ4JNICompressor();
private static LZ4Compressor SAFE_INSTANCE;
@Override
public int compress(byte[] src, int srcOff, int srcLen, byte[] dest, int destOff, int maxDestLen) {
checkRange(src, srcOff, srcLen);
checkRange(dest, destOff, maxDestLen);
final int result = LZ4JNI.LZ4_compress_limitedOutput(src, null, srcOff, srcLen, dest, null, destOff, maxDestLen);
if (result <= 0) {
throw new LZ4Exception("maxDestLen is too small");
}
return result;
}
@Override
public int compress(ByteBuffer src, int srcOff, int srcLen, ByteBuffer dest, int destOff, int maxDestLen) {
checkNotReadOnly(dest);
checkRange(src, srcOff, srcLen);
checkRange(dest, destOff, maxDestLen);
if ((src.hasArray() || src.isDirect()) && (dest.hasArray() || dest.isDirect())) {
byte[] srcArr = null, destArr = null;
ByteBuffer srcBuf = null, destBuf = null;
if (src.hasArray()) {
srcArr = src.array();
srcOff += src.arrayOffset();
} else {
assert src.isDirect();
srcBuf = src;
}
if (dest.hasArray()) {
destArr = dest.array();
destOff += dest.arrayOffset();
} else {
assert dest.isDirect();
destBuf = dest;
}
final int result = LZ4JNI.LZ4_compress_limitedOutput(srcArr, srcBuf, srcOff, srcLen, destArr, destBuf, destOff, maxDestLen);
if (result <= 0) {
throw new LZ4Exception("maxDestLen is too small");
}
return result;
} else {
LZ4Compressor safeInstance = SAFE_INSTANCE;
if (safeInstance == null) {
safeInstance = SAFE_INSTANCE = LZ4Factory.safeInstance().fastCompressor();
}
return safeInstance.compress(src, srcOff, srcLen, dest, destOff, maxDestLen);
}
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy